I have to admit, that I regret developing an R32 GTR as a track car.
Although I knew what I was getting myself into, in terms of financial outlay, I feel that I could have gotten a hell of a lot more "bang for buck" elsewhere.
If you really do have the $100-150k budget to build a top shelf GTR track/time attack car, there are much better options out there.
For instance, a Porsche GT3 Cup car.... There are hundreds to chose from now the series has died. Heaps are listed at $99,000 asking, and aren't moving, due to severe lack of interest and the whole GFC bullsh1t... These are $250-300k cars, which you can pick up for $80-85k. Less if you find a desperate seller.
Bulletproof engines, and sizzling lap times for a relatively small entry price. Would make one HELL of a time attack and supersprint car.
Oh well. I'm still young. After I'm done playing with this toy, I'll move on to much better starting platforms